Xiao-Zeng Li

Xiao-Zeng Li
Tianjin University | tju · Department of Chemistry

About

123
Publications
2,393
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,006
Citations
Citations since 2016
9 Research Items
406 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060

Publications

Publications (123)
Article
A pair of enantiomeric ligands, (2R,3R)‐dibenzyl‐2,3‐bis(isonicotinoyloxy)succinate ((R,R)‐L) and (2S,3S)‐dibenzyl‐2,3‐bis(isonicotinoyloxy)succinate ((S,S)–L), are designed and synthesized. Seven copper (II) coordination polymers {[Cu((R,R)‐L)Br 2 (THF)]·CH 3 CN} n ( 1a ) and {[Cu((S,S)‐L)Br 2 (THF)]·CH 3 CN} n ( 1b ), {[Cu((R,R)‐L)Cl 2 (THF)]·CH...
Article
Research on coordination polymers (CPs) using 2-deoxy-d-ribose derivatives as ligands has not been documented to the best of our knowledge. Herein, the new ligand L (1,3,4-trikisisoniacyl-2-deoxy-β-d-ribopyranose) was designed and synthesized from 2-deoxy-d-ribose, and four CPs {[MnL2Cl2]·4CH3OH}∞ (1), {[CoL2Cl2]·4CH3OH}∞ (2), {[NiL2Cl2]·4CH3OH}∞ (...
Article
Three coordination polymers (CPs) {[CuL2Br]Br·6H2O}∞ (1), {[CuL2Cl2]·2.5CH3OH·3.5H2O}∞ (2) and {[NiL2(NO3)2]·CH3CN·3CH3OH·H2O}∞ (3) were prepared using a new d-ribose derivative ligand L (L = 1,2,3,4-tetrakisisoniacyl-β-l-ribopyranose). X-ray single crystal analysis revealed that 1–3 all crystallized in the triclinic P1 space group, all the CPs hav...
Article
Full-text available
Rapid, reliable and highly selective detection of mercury species, including Hg2+ ion and organomercury, is of significant importance for environmental protection and human healthy. Herein, a new fluorescent dye 1,1,2,2-tetrakis[4-(3-methyl-1H-benzimidazol-1-yl)phenyl ethylene tetraiodide (Tmbipe) with aggregation-induced emission (AIE) potential w...
Article
A new macrocyclic oxamido carboxylate metalloligand was designed and three heteronuclear coordination polymers of the metalloligand and metal nodes Cu²⁺, Zn²⁺ and Cd²⁺ were prepared. X-ray single crystal analyses (CIF files CCDC nos. 1025722–1025724 for I–III) revealed that multiple favourable features endowed the metalloligand with a strong power...
Article
A new water-soluble cationic porphyrin derivative m-TMPyEOPP (5,10,15,20-tetrakis{4-[2-(O-(N-methylpyridyl)ethoxyl]oxyphenly}porphyrin) has been designed, synthesized, and fully characterized. This porphyrin derivative combines the advantages of two cationic porphyrins used in G-quadruplex recognition and stabilization studies, i.e., the widely inv...
Article
A water-soluble, cationic bis-porphyrin (Bis-TMPipEOPP) was synthesized, characterized, and its optical properties were investigated. Its fluorescence was found to be specifically quenched by paramagnetic Cu²⁺ ions via a static quenching mechanism. Based on these findings, an organic solvent-free sensing platform was developed for the “turn-off” de...
Article
A new macrocyclic oxamido-nickle(II) complex Na2NiL was synthesized. L denotes the doubly deprotonated forms of (13Z, 19Z)-16-methyl-6,7-dioxo-5,6,7,8-tetrahydrotriben-zo[b,f,l][1,4,8,11]tetraazacyclotetradecine- 13,20-dicarboxylate. Based on the complex ligand Ni(L2–), two heterometallic complexes [Ca2(NiL)2(H2O)8] · 10H2O (I) and [Co(NiL)2(H2O)2]...
Article
Three new coordination polymers, {[Mg(NiL1)(H2O)3]·CH3CH2OH·2H2O}n (1), {[Zr2(NiL1)2(OH)4(H2O)2]·8H2O}n (2) and {[Pb(NiL1)(H2O)2]·3H2O}n (3), were prepared from a macrocyclic metalloligand NiL1. H2L1 denotes 1,4-dihydro-2,3-dioxo-5,6:- 9,10:13,14-tribenzo[1,4,8,11]tetraazacyclotetradeca-7,11-diene-7,12-dicarboxylate. Single crystal X-ray diffractio...
Article
A porous metal-organic material of the doubly deprotonated form of a new bis(aroylhydrazone) ligand (L12−) was self-assembled from 2,3-butanedione, isonicotinoyl hydrazine and lead nitrate. X-ray single crystal analysis revealed that six L12− and six Pb2+ are arranged alternately to form a metallomacrocycle in the porous material. Weak coordination...
Article
We report an efficient one-step approach to reduce and functionalize graphene oxide (GO) during the in situ polymerization of phenol and formaldehyde. The hydrophilic and electrically insulating GO is converted to hydrophobic and electrically conductive graphene with phenol as the main reducing agent. Simultaneously, functionalization of GO is real...
Article
This study aimed to provide data for imaging diagnosis and clinical surgical plans by reconstructing a three-dimensional (3-D) digital visible heart model of single ventricle (SV) connection with aortic coarctation (CoA) and characterizing the myocardial and vascular wall pathological characteristics. Fifteen miscarried fetus cadavers with SV and C...
Article
Tetrapod-shaped zinc oxide (T-ZnO) whiskers and boron nitride (BN) flakes were employed to improve the thermal conductivity of phenolic formaldehyde resin (PF). A striking synergistic effect on thermal conductivity of PF was achieved. The in-plane thermal conductivity of the PF composite is as high as 1.96W m(-1) K-1 with 30 wt.% BN and 30 wt.% T-Z...
Article
The G-quadruplex-disrupting abilities of Ag+ and Hg2+ ions were investigated by utilizing the metal ions-mediated circular dichroism (CD) spectrum changes of four representative G-quadruplexes. The results show that Ag+ ion can disrupt G-quadruplexes by chelating to G bases and thus can be used as a general G- quadruplex-disrupting agent. The resul...
Article
Objective: To build the dataset of visible fetus with single ventricle (SV) and aortic coarctation (CoA), and to rebuild a 3D digitized heart model. Methods: After undergoing macroscopical, CT and MR examinations, a cadaver of 35- week female fetus with SV and CoA which weighted 2650 g was selected. A digital milling machine was used to shave off s...
Article
The high rigidity, asymmetric exoditopic coordination mode, angular orientations of the coordination tops and good coordination adaptability of the metalloligand, the ππ stacking between the adjacent metalloligands in the polymeric chains and the coordination characteristics of the nodes are responsible for the formation of the eight 1D helices.
Article
Six new complexes 1–6 with the common formula [M(NiL)4][M(NCS)4] (M = Mn, Fe, Co, Ni, Cu and Zn for 1, 2, 3, 4, 5 and 6, respectively; the same below) were synthesised and structurally characterised by X-ray single crystal analysis. NiL acts as a complex ligand. L denotes the dianion of dimethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo-[1,4,8,11]te...
Article
A mononuclear macrocyclic oxamide complex CuL was used as a new metalloligand to prepare polynuclear complexes, by which a new tetranuclear complex {Mn[CuL(ClO4)]3}·H3O·2.5H2O (1) and a new trinuclear complex {Cu[CuL(CH3OH)]2(ClO4)2} (2) were obtained (H2 L = dimethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo-[1,4,8,11]tetraazacyclotetradecine-13,18...
Article
Two coordination polymers, {[Zn(NiL)(DMA)(H2O)2] (DMA)(H2O)}n (1) (DMA = N,N-dimethylacetamide) and {[Zn2(NiL)2(DMF)(H2O)4] · 3DMF}n (2) (DMF = N,N-dimethylformamide), have been prepared by reactions of Zn(NO3)2 · 6H2O and NiL in CH2Cl2-DMA–H2O and CH2Cl2-DMF–H2O, respectively. H2L denotes dimethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo-9,10-benz...
Article
The aim of the present study was to explore the role of selenoprotein P (SePP) in the etiology of the endemic sudden cardiac death in Yunnan, China. The levels of SePP of 124 subjects and glutathione peroxidase (GPx) of 119 subjects were measured. The subjects were from the old and new endemic areas and non-endemic areas. The levels of SePP and GPx...
Article
Two new one-dimensional heterometallic coordination polymers, {[Ca(NiL)(H2O)4] · 3H2O}n (1) and {[Pb(NiL)(H2O)2] · 3H2O)}n (2), have been prepared by reactions of CaCl2 and NiL and Pb(NO3)2 and NiL in CH2Cl2–H2O. H2L denotes dimethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo-9,10-benzo-[1,4,8,11]tetraazacyclotetradecine-13,18-dicarboxylate. Single-c...
Article
Three new double-chain coordination polymers {[Pr(NiL1)2(H2O)3](ClO4)3·2H2O}∞ (1), {[Sm(NiL1)2(H2O)3](ClO4)3·2H2O}∞ (2) and {[Gd(NiL1)2(H2O)3](ClO4)3·2H2O}∞ (3) were prepared and structurally characterized by X-ray single-crystal analyses. L1 denotes the doubly deprotonated form of 2-hydroxyethoxyethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo[1,4,8...
Article
Objective: To observe protective effects on rat serum cardiac enzymes and the antioxidant capacity of selenium and vitamin E. Methods: According to body weight and 2 x 2 factorial design, eighty male Wistar rats were randomly divided into four groups: low selenium and low vitamin E group (feed containing 23.42% of the low selenium yeast, excluding...
Article
Full-text available
The discovery of uncommon DNA structures and speculation about their potential functions in genes has brought attention to specific DNA structure recognition. G-quadruplexes are four-stranded nucleic acid structures formed by G-rich DNA (or RNA) sequences. G-rich sequences with a high potential to form G-quadruplexes have been found in many importa...
Data
Absorption titration of TMPipEOPP with M3Q. [TMPipEOPP] = 5 µM. The M3Q concentration increases from 0 to 20 µM. (TIF)
Data
Absorption titration of TMPipEOPP with Oxy28. [TMPipEOPP] = 5 µM. The Oxy28 concentration increases from 0 to 50 µM. (TIF)
Data
Absorption titration of TMPipEOPP with AT, GC, LD, CtDNA, ssDNA1 or ssDNA2. [TMPipEOPP] = 5 µM. The concentration of each DNA is shown in the figure. The concentrations of AT, GC, LD, ssDNA1 and ssDNA2 are represented as single-stranded concentrations. The concentration of CtDNA is represented as base concentration. (TIF)
Data
Job plots resulting from the method of continuous variation analysis for TMPipEOPP with Hum24. [TMPipEOPP]+[Hum24] = 5 µM. (TIF)
Data
Job plots resulting from the method of continuous variation analysis for TMPipEOPP with Oxy28. [TMPipEOPP]+[Oxy28] = 5 µM. (TIF)
Data
Selected bond lengths(Å) and angles(°) of TPipEOPP•2.5MeOH. (DOC)
Data
Fluorescence spectra of TMPipEOPP in the absence or presence of different DNAs when excited at 700 nm. [TMPipEOPP] = 5 µM. [DNA] = 10 µM (strand concentration). [CtDNA] = 240 µM (base concentration). (TIF)
Data
Absorption titration of TMPipEOPP with KRAS. [TMPipEOPP] = 5 µM. The KRAS concentration increases from 0 to 50 µM. (TIF)
Data
Job plots resulting from the method of continuous variation analysis for TMPipEOPP with KRAS. [TMPipEOPP]+[KRAS] = 5 µM. (TIF)
Data
Scatchard plots for TMPipEOPP with individual G-quadruplexes. r is moles of bound TMPipEOPP per mole of G-quadruplex. (TIF)
Data
The chemical structures of TMPyP4 and TMPipEOPP. (TIF)
Data
CD spectra of M3Q, Oxy28, KRAS and Hum24. (TIF)
Data
Job plots resulting from the method of continuous variation analysis for TMPipEOPP with M3Q. [TMPipEOPP]+[M3Q] = 5 µM. (TIF)
Data
The synthetic route of TMPipEOPP. (TIF)
Data
The proposed binding modes between TMPipEOPP and G-quadruplex at different [G-quadruplex]/[TMPipEOPP] ratios. (TIF)
Data
Job plot analysis using the fluorescence signals at 726 nm. [TMPipEOPP]+[G-quadruplex] = 5 µM. λex = 700 nm. (TIF)
Data
Soret band hypochromicity caused by the titrations of TMPipEOPP with oligonucleotides. (DOC)
Article
Objective: To explore the effect of selenium, protein and vitamin E deficiency on mRNA expression of rat cardiac selenoprotein, and their relation with myocardial injury. Methods: Forty male Wistar rats were randomly divided into 4 groups: low selenium low protein low vitamin E group (group A), low selenium low protein adequate vitamin E group (gro...
Article
New macrocyclic oxamide complexes suitable for being used as metalloligands to link metal ions were designed. Six coordination compounds containing a member of the new metalloligands as the bridging ligand were prepared. X-ray single crystal analysis revealed that the six compounds include a dodecanuclear structure, three 1D helical chainlike coord...
Article
Two new linear trinuclear complexes, [Co(NiL)2(SCN)2] (1) and [Co(NiL)2(H2O)2](ClO4)2 · 2C2H5OH (2), have been prepared by using Co(ClO4)2 · 6H2O and two macrocyclic complex ligands NiL and NiL. L and L are the doubly deprotonated forms of dimethyl 5,6,7,8,15,16-hexahydro-6,7-dioxodibenzo[1,4,8,11]tetraazabicyclo[12.4.0]13,18-dicarboxylate and dime...
Article
A mononuclear macrocyclic complex NiIIL3a (L3a=dianion of 2,3-dioxo-5,6:13,14-dibenzo-9,10-cyclohexyl-7,12-bis(methoxycarbonyl)-1,4,8,11-tetraazacyclotetradeca-7,11-diene), which shows high DNA cleavage activity in the presence of H2O2, was reported in our previous work. Considering that many systems for natural enzyme-mediated DNA cleavage contain...
Article
Permafrost wetlands are one of the most sensitive plant communities in response to global warming. Global warming could induce natural plant communities to shift into cooler climate zones, or extirpate. To understand how plant communities in permafrost wetlands are affected by global warming, we examined the patterns of plant species diversity in t...
Article
A new complex [Fe(N-isonicotinamidosalicylaldimine)Cl2] has been synthesized by template reaction at room temperature and structurally characterized by X-ray single-crystal analysis. The complex crystallizes in triclinic crystal system, Pī space group, a = 7.273(6) Å, b = 10.015(8) Å, c = 10.479(8) Å, α = 71.067(10)°, β = 89.964(11)°, γ = 75.528(10...
Article
Rocky desertification is one of the eco-geological disasters widely distributed in karst areas of Southwest China, and one of the hotspots and difficulties in ecology and environmental sciences. From the viewpoints of landscape ecology, and with the help of Erdas 9. 1 and ArcGIS 9? 0, a case study was made in the Puding County of Guizhou Province,...
Article
The DNA cleavage activities of nickel(II) ion and four closely related macrocyclic nickel(II) complexes NiL1∼NiL4 in the absence of any added redox cofactors are compared and the structure of NiL3 methanol solvate has been characterized by single crystal X-ray analysis, where L1∼L4 are the dianions of tetraazamacrocyclic oxamido Schiff bases. In Ni...
Article
An investigation was made on the ecological characteristics and areal types of the plants in 24 permafrost wetlands in the Great Hing-an Mountains. There were 201 plant species, belonging to 40 families and 121 genera. The species of Compositae and Rosaceae were dominant, occupying 26-8% of the total. In five life forms, hemicryptophytes occupied 7...
Article
To explore distribution of potential rocky desertification and their relationship with topographic factors, the middle and lower reaches of the Houzhai subsurface stream in Puding County was chosen as a study area. With the aid of GIS software, the 2004 potential rocky desertification distribution map was studied to analyze quantitatively correlati...
Article
New trinuclear complexes [Cu(NiL1)2(C2H5OH)2](ClO4)2 (1) and [Co(NiL2)2(H2O)2](ClO4)2 center dot 2(H2O) (2) were prepared using macrocyclic complex ligands with excess Cu(ClO4)2 center dot 6(H2O) and Co(ClO4)2 center dot 6(H2O), respectively, and characterized by X-ray crystallography. L1 and L2 denote the dianions of diethyl 5,6,7,8,15,16-hexahydr...
Article
Objective: To explore the relationship between myocardial damage and antioxidant capacity in vivo of Keshan disease patients and to analyze the possible pathogenesis. Methods: In the period from 2005 to 2006, 41 chronic and latent Keshan disease cases were chosen as the case group from such serious endemic areas as Yongjin Village, Xinfa Village of...
Article
A novel one-dimensional heterometallic complex, {Cd2[NiL]2(SCN)4(H2O)}n (1), has been synthesized and characterized by single-crystal X-ray analysis, where L is dianion of 2,3-dioxo-5,6,13,14-dibenzo-9,10-cyclohexyl-7,12-bis(ethoxycarbonyl)-1,4,8,11-tetraazacyclotetradeca-7,11-diene. The most striking feature of 1 is that in the structure there is...
Article
By the method of time series analysis, the evapotranspiration of reference vegetation in the small watersheds of continuous permafrost on the northern slope of Great Hing'an Mountains was approached. The results showed that the evapotranspiration of the reference vegetation, ETo, had an obvious periodic fluctuation within a year, i.e., from relativ...
Article
Objective: To explore the inhabitants' knowledge about Keshan disease(KD) in endemic area in Heilongjiang Province and analyze its influencing factors. Methods: Yongjin Village, a national KD monitoring site in Fanrong Township of Fuyu County in Heilongjiang Province, was selected as an investigating spot. Specially designed questionnaire was appli...
Article
The chemical nuclease activities of three closely related Schiff base tetraazamacrocyclic oxamido copper(II) complexes (CuL1-3) were compared and the result shows that their chemical nuclease activities follow the order of CuL3>CuL2>CuL1. Where complexes CuL1-3 are [5,6-d][13,14-d]dibenzo-1,4,8,11- tetraazacyclotetradecanedione-2,3-diene-7,11-di-et...
Article
Objective: To acquaint the situation of selenium nutrition level and coxsakievirus B (CVB) infection in Keshan disease(KD) patients in Heilongjiang province, and provide the evidence for taking the direction measurements of KD control. Methods: The subjects were divided into three groups: disease area KD group, disease area control group, and non-d...
Article
The kinetics of DNA cleavage, especially the conversion of supercoiled to nicked DNA, by two 4,4′-dimethyl-2,2′-pyridyl (dmbpy) manganese (II) complexes, Mn (dmbpy)2 (OCN)2(1) and Mn(dmbpy) 2(dca)2(2), was investigated. Results show that there is similar kinetic characterization for complex 1-mediated DNA cleavage and 2-mediated DNA cleavage. For t...
Article
Objective: To explore the potential risk factors to Yunnan endemic sudden cardiac death (YESCD) and provide evidence for prevention. Methods: Twenty-two cases and 24 controls were randomly selected from YESCD areas and non-YESCD areas, respectively. Both cases and controls were interviewed with unified questionnaires. Univariate χ2 test and multiva...
Article
Objective: To explore the effect of associated deficiency of selenium, protein and vitamin E (VE) on the thyroid injury and thyroid hormone metabolism of the rats in a long-term. Methods: The Wistar rats were randomly divided into four groups: Group A with selenium deficiency and low protein and VE; Group B with selenium deficiency, low protein but...
Article
Nickel is considered a weak carcinogen. Some researches have shown that bound proteins or synthetic ligands may increase the toxic effect of nickel ions. A systematic study of ligand effects on the interaction between nickel complexes and DNA is necessary. Here, we compared the interactions between DNA and six closely related Schiff base tetraazama...
Article
A molecular rectangle [Cu{CuL1(NO3)}(H2O)(NO3)]2 (1) and two infinite molecular rectangle strands {[Cu{CuL1(NO3)}2]·2H2O}∞ (2) and [Cu{CuL2(ClO4)}2]∞ (3) were prepared by reaction of “naked” Cu(II) ions with macrocyclic complex ligands CuL1 for 1 and 2 and CuL2 for 3 in metal-to-ligand molar ratios of 1:1, 1:2 and 1:2, respectively. L1 and L2 denot...
Article
Two new mononuclear Mn(II) complexes, Mn(dmbpy)2(OCN)2 (1) and Mn(dmbpy)2(dca)2 (2) (dmbpy=4,4′-dimethyl-2,2′-bipyridine, dca=dicyanamide), have been synthesized and characterized by IR, elemental analysis, and single crystal X-ray analysis. Both complexes have similar molecular structures. The coordination sphere of the Mn(II) ion in 1 or 2 is a s...
Article
Spatial pattern and processes are two most important aspects of landscape ecological study. Compared with patch-based studies, boundary-based studies provide new perspectives in understanding landscape processes. We analyzed data from TM image, forest stand map, land use map and field investigation using GIS, RS, and Fragstats software. With an exa...
Article
Objective: To explore the correlation between, blood Glutathione peroxidase activities (GSH-Px) and plasma cardiac troponin I(cTnI) of the people in Yunnan unkown-cause sudden cardiac death areas. Methods: The disease areas were divided into two groups, either with selenium supplementor not. The control group was set up in non-disease area. Blood G...
Article
Objective: To study the probability of using the weather condition as a signal to detect the outbreak of Yunnan endemic sudden cardiac death (YESCD) by determining the hygienic index of drinking water sampled from YESCD area as well as investigating the weather condition and analyzing its influence. Methods: Drinking water and weather condition wer...
Article
Taking the Huzhong National Reserve in Great Hing' an Mountain as test object and by the methods of multiple comparison and correlation analysis, this paper studied the thickness of permafrost's active layer in the Reserve and related affecting factors. The results indicated that the thickness of the active layer had complicated relationships with...
Article
Full-text available
By using Landsat TM satellite images and combined with field investigation, the information of farmland boundaries in upper Minjiang River reaches was derived, and the edge effect of forestland-farmland boundary at landscape scale was investigated. The results showed that there were 5 types of farmland boundaries, i. e., forestland-farmland boundar...
Article
Forest gap model is an individual-based forest model being used extensively in simulating and predicting the long-term dynamics of forest succession, and a useful tool for studying the potential responses of forest ecosystem to climate change. In this paper, the development and evolution process of forest gap model was generalized into three stages...
Article
The LINKAGES model was used to make simulation predictions of future succession dynamics of different stands with various age classes in the primeval forests of Xiaoxinganling Mountains under five climate change scenarios. The five climate change scenarios were OSU, GISS, GFDL, UKMO and CGCM2. The simulation results for all simulated stands indicat...
Article
Based on the differences of physical geography, the forest in the upper reaches of Minjiang River was divided into four types, i. e., dark coniferous forest, other coniferous forests, broadleaf forest, and shrubbery. The benefits of water conservation by these forest types were calculated by using relevant indicators such as annual rainfall, crown...
Article
Objective: To explore the effect of selenium deficiency and nutrien deficiency on the myocardial injury of the rats in a long-term. Methods: Forty Wistar rats were randomly divided into two groups: experiment group with selenium, nutrien deficiency and low Vitamin E intake; control group with normal selenium, nutrition and Vitamin E intake. The rat...
Article
Objective: To study on the prevalence and incidence of Keshan disease (KD) in Yongjin and Xinfa of Fuyu national surveillance site in 2005. Methods: Based on the Standard of Keshan Disease Surveillance (WS/T 78-1996) and the Standard of Diagnosis of Keshan Disease (GB 17021-1997), the residents in the surveillance site were surveyed. The registered...